The Oxygen debt occurs in muscles when a
The pulse rate has increased
b
None of these
c
Anaerobic respiration has taken place.
d
More oxygen is available

if anaerobic activity takes place over a long period of time the muscles soon become exhausted

The sum of an organism's observable characteristics is their phenotype. A key difference between phenotype and genotype is that, whilst genotype is inherited from an organism's parents, the phenotype is not. Whilst a phenotype is influenced the genotype, genotype does not equal phenotype